Mobile Opportunistic Networks (MONs) are characterized by the lack of continuous end-to-end connectivity between two nodes due to node mobility, sparse deployment, and constrained resources. In order to fulfill ubiquitous communication requirements of them, social-aware routing, which exploits social ties and behaviors among nodes to make forwarding decisions, has been proposed and already become a promising approach to enable data delivery in MONs. In this article, we present an insightful review of social-aware routing in MONs through thorough investigations to provide a comprehensive understanding and inspire more in-depth studies. We first explore the motivations behind social-aware routing and introduce various social metrics commonly used. Then we investigate existing social-aware routing schemes in terms of design principles, evaluation metrics, taxonomy, relay selection and message distribution, respectively. Finally, we outline emerging challenges and open issues with respect to social metrics, social perception, privacy and security, emerging applications and experiments in this area.

中文翻译：

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移动机会网络中的社交感知路由

移动机会网络（MON）的特征在于，由于节点的移动性，稀疏的部署和有限的资源，两个节点之间缺乏连续的端到端连接。为了满足它们的无处不在的通信要求，已经提出了利用节点之间的社会联系和行为来做出转发决定的社会感知路由，并且已经成为在MONs中实现数据传递的一种有前途的方法。在本文中，我们将通过全面的调查对MONs中的社交意识路由进行深入的研究，以提供全面的了解并激发更深入的研究。我们首先探讨社交感知路由背后的动机，并介绍各种常用的社交指标。然后，我们根据设计原则调查现有的具有社交意识的路由方案，评估指标，分类法，中继选择和消息分发。最后，我们概述了与社交指标，社交感知，隐私和安全性，该领域新兴应用程序和实验有关的新出现的挑战和未解决的问题。